Perhaps take a picture (from eyepiece position) with focuser screwed half way out for the gurus here to comment on Andrew.
On the odd occasion I've taken the secondaries of my scopes completely out of whack just to force me to learn how to get things aligned properly. At the rough early stages of alignment/collimation, I also find it can help to forget the 3 secondary screws and just use your hand to get a feel for "where you to go" before getting back into it with the Allen key.....
(Caution: Rob enterprises can not be held legally responsible for the total destruction of your hard won collimation...!)
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